By Edwin Lyle Brown
Written to entice a wide viewers, 802.1X Port-Based Authentication seeks to outline this advanced suggestion in available phrases and to discover its numerous functions to state-of-the-art laptop networks utilizing this actual community protocol. this article assumes that the reader could have very little previous wisdom and just a common realizing of machine networking, offering an introductory review in addition to a subject matter assessment in every one bankruptcy. It offers an in-depth dialogue of expertise, layout, and implementation with a particular specialize in Cisco units. together with examples derived from the 802.1X implementation, this ebook additionally addresses troubleshooting concerns in a Cisco surroundings.
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Extra resources for 802.1X Port-Based Network Access Authentification
Three types—MD5-Challenge, one-time passwords (OTP), and Generic Token Card—are required by the speciﬁcations for EAP. A few of the EAPMethods have been documented in IETF RFCs, but the majority are proprietary. Some of the more common methods are EAP-TLS, EAP-TTLS, PEAP, and EAP-FAST. This book is primarily concerned with the process of authentication and not the particular method employed, so particular EAPMethods are discussed only brieﬂy. AU4464—CHAPTER 2—27/10/2006—19:02—JEBA—15576—XML MODEL C – pp.
The port on the Authenticator connecting the LAN/WAN might be faulty. The LAN/WAN between the two devices might be faulty. Or the shared secret might be misconﬁgured. Those are some of the possibilities. In any event, the Authenticator will try for a long time to access the deﬁned servers. 10. If there is no Authentication Server willing to communicate with the Authenticator, then it has options. Usually, it will continue to attempt to ﬁnd a valid RADIUS server, leaving the port in an unusable state.
Typically, these additional iterations are caused by the user on the Supplicant not knowing the proper credentials, or mistyping them, thus causing the Authentication Server to reject them. The process for Generic Token Cards is very similar to that for One-Time Passwords. The information contained in the exchange is different, but the actual ﬂow is essentially the same. The use of a Token card will always require that the user enter information rather than use credentials supplied when the Supplicant was booted.